Manufacture of dyestuff preparations and their application in the printing of textiles



Patented Dec, 8, 1933 UNITED STATES PATENT OFFHQE HEINRICH BERNEARD AND FRIEDRICH FELIX, OF BASEL, SWITZERLAND, ASSIGNORS T SOCIETY OF CHEMICAL INDUSTRY IN BASLE, OF BASEL, SWITZERLAND 1 MANUFACTURE OF DYESTUFi PREPARATIONS AND THEIR APPLICATION IN THE PRINTING- OF TEXTILES No Drawing. Application filed August 31, 1929, Serial No. 389,870, and in Switzerland September 18, 1928.

The present invention relates to the manufacture of dyestuff preparations and the composition of printing pastes. It comprises the manufacture of these preparations and the composition of these printing pastes, as well as their application in the textile industry.

A known process of'printing vat-dyestuffs consists in mixing the dyestufl paste with. a suitable thickening having an alkaline re action and printing the paste, in reduced or unreduced form, on a textile material. Generally sodium carbonate, potassium carbonate, sodium hydroxide or the like is used as the alkaline agent and according to the con ditions there may be used as reducing agent an alkali hydrosulfite or an alkali aldehyde sulfoxylate. The usual thickening agents are British gum, dry gum, starch, vegetable mucilage or the like. To the paste there is usually added as an assistant glycerine or one of its substitutes. The printed textile is then steamed in the absence of air; the colour is then developed by oxidation, the material is washed and the shade is developed by a boiling soap solution.

. The productiveness of the printing colours thus obtainable varies according to the nature of the vatdyestufi and can be improved,

as is known, by increasing the proportion of glycerine. This expedient, however, has dis-.

advantages; for example, the prints absorb moisture before and after steaming and in consequence will mark ofi'.

This invention is based on the observation that the productiveness of the printing colours is considerably improved if the printprinted, dried, steamed, washed, soaped and finished.

Instead of stirring urea into the printing color solid preparations may also be obtained by mixing the finely dispersed-dyestufl paste with products which are at the same time dispersing agents and protective colloids, such as sulfite cellulose waste liquor, 'sulfonation products of the distillation residues of benzaldehyde, benzylsulfanilic acid, condensation products from naphthalene sulfonic acids and formaldehyde, etc, and urea, and then drying the product thus obtained, if necessary with addition of a suitable wetting agent, such as inter alia propylated or butylated naphthalene sulfonic acids or other products having a similar action.

The following examples illustrate the invention:-

Example 1 A printing color is prepared from 100 grams Cibanone Orange 6R paste (cf. The Dyer and Calico Printer, 1925, No. 629, page 128, right-hand column, line 34) 650 grams potash thickening 50-100 grams urea. 50100 grams sodium formaldehyde-sulfoxylate, solution 1/1 50-100 grams water.

The printing paste is applied to the textile material in the usual mannerfibrilliant orange prints being produced; if th urea be omitted only very weak prints ar obtained.

The potash thickening used in this example is prepared in the following manner 100 grams maize starch 200 gramsof water 250 grams of British gum (dry) and 100 grams of glycerine are boiled together and there are then added 150 grams of potassium carbonate dissolved in 200 grams of'water.

In preparing the printing paste the ureais dissolved in the potash thickening, advan-'- tageously whilst gently warming, whereupon tlei1 dgestufi and the hydrosulfite solution are a e Similar results are obtained by using another alkali instead of potassium carbonate,

for example sodium carbonate or sodium hy; droxide or another thickening agent or reducin agent (for example sodium hydrosulfite The invention is also applicable to Cibanone Blue COD the production of printing pastes from Other vatdyestufls, for example Cibanone Red Gr, (of. The Dyer and Calico Printer, 1925, No. 629, page 128, right-hand column, line 34), (cf. Colour Index No. 1115), Ciba Blue 2BD (cf. SchultzNo. 901), Algol Olive R (cf. Farberzeitung 1911, page 384, left-hand column, line 17 from bottom),

' Indanthrene Printing Black B (cf. Deutscher Farber-Kalender, 1914, page 311), Helindone Golden Orange JG (cf. Deutscher Farber- Kalender, 1922, page 146), and other vatdyestuffs of various classes.

Example 52 500 parts of Cibanone Orange 6R (cf. Example 1 above) are finely triturated with 1650 parts of urea, 290 parts of dry sulfite cellulose waste liquor and 5 parts of a suitable wetting agent, such for example as alkylated' ,B-naphthalene sulfonic acids, dissolved in 2000 parts of water.

The homogeneous dyestuff paste thus obtained is dried in a vacuum. There is thus obtained an easily pulverizable preparation which disperses finely and uniformly in the printing paste.

' Example 3 83 parts of a press-cake containing 40 parts of Ciba Brown G (of. Melliands Textilberichte 1928, page 699, right-hand column, line 2 from bottom) are finely triturated with 100 parts of urea, 40 parts of dry sulfite cellulose waste liquor and 0.1 part of the wetting agent from the condensation products mentioned in the preceding example, and 100 parts of water, and the dyestufl paste is dried in a vacuum.

Example 4 172 parts of Cibanone Orange 6R (cf. Ex-

ample 1 above), 250 parts of urea, 400 parts of water, parts of sulfite cellulose waste liquor of 50 per cent. strength, and 10 parts of one of the condensation products named in Example 2 from naphthalene-,B-su'lfonic acid are finely triturated in a suitable mill. In

' this manner there is obtained a. paste which is excellently suitable for printing textile materials. A

Example '5 57 parts of-Cibanone Orange 6R (cf. Ex

ample 1 above) are finely triturated with 40 50 grams of sodium-formaldehydesulfoxylate dissolved in o 50 grams of water. The whole is made up with j 50 grams of water to 1000 grams.

This printing paste is applied to the textile material in the usual manner, brilliant, orange or brown prints being produced. If the urea is omitted only very weak prints are obtained.

A printing paste giving the same result may be produced by adding not only sodium -formaldehyde-sulfoxylate but also sodiumhydrosulfite together with sodium-formaldehyde-sulfoxylate, in which case 20 grams of sodium hydroxide solution of 72 Tw. are also added.

Preparations showing a similar favorable effect can also be made with other dyestuffs of the anthraquinone series, such as inter alia Cibanone Yellow 2G (cf. Melliands Textilberichte 1928, page 780, righthand column, line 11) Cibanone Yellow R- (of. Schultz No. 795), Cibanone Yellow GK (cf. Schultz No. 817), Cibanone Orange R (cf. Schultz No. 792), Cibanone Black B (cf. Schultz No. 765), Cibanone Yellow GN (cf. Schultz No. 849), Cibanone Violet 2R (cf. Schultz N0. 707), Cibanone Violet R (cf. Schultz No. 766), Cibanone Dark Blue BO cf. Schultz No. 763), Cibanone Blue GCD tcf. Schultz No. 842), Cibanone Blue RS (cf. Schultz No. 838), Cibanone Blue 3G (cf. Schultz No. 798), Cibanone Green B (cf. Schultz No. 765), and also with indigoid dyestuffs, such as Ciba Orange G (cf. Schultz No. 911), Ciba Red 3B (cf. Schultz No. 918), Ciba Violet B (cf. Schultz No. 901) Ciba Blue 2G (cf. Schultz No. 882), Ciba Blue 2B (cf. Schultz N o. 881), Ciba Blue G (cf. Schultz What we claim is 1. The fixing of vat-dyestuffs in the printing of textiles, consisting in steaming the vatdyestufi' on the textiles in presence of a re-' ducing agent and of urea.

2. The fixing. of vat-dyestuffs in the printing of cotton, consisting in steaming the vatdyestufi" on'the cotton in presence of an alkali aldehyde sulfoxylate and of urea.

In witness whereof we have hereunto signed our names this 21st day of .A 'ugust,

\ HEINRICH BERNHARD.

FRIEDRICH FELIX. 

